What is a manufactured controlled auxillary emissions control?

Most states require an emissions inspection now and a vehicle without a catalytic converter will not pass this inspection. A state or local inspection program has determined that the existing converter needs replacement2. Vehicles manufactured prior to 1996 must have more than 50,000 miles and a legitimate need for replacement must be established and documented3.

In cases of OBD Il-equipped vehicles (1996 and later), the O.E. manufacturer's 8-year/80,000-mile warranty must have expired and a legitimate need for replacement must be established and documented.(Note that Federal law prohibits removal or replacement of a properly functioning O.E. converter). Some muffler shops or exhaust shops will replace a perfectly working converter for profit, even thought the law states otherwise.